The effect of investment on economic growth in Iran's road transport sector using neoclassical growth modelPBazdarardabiliمربی، پژوهشکده حمل‌ونقل، تهران، ایرانauthortextarticle2015perRoad transport as one of the factors of affecting economic, Displacement of goods and passengers, areas of access to facilities and national welfare increases and Investment in this sector as a key factor, determining a critical role in the road transport sector is growing. Therefore, the transitional capital of the department of road transport and the changes is important in this section and Understanding of the quantitative and qualitative, decision-making and planning in the road transport sector in the macro and micro levels, is important. The objective of this paper is analysis of investment on economic growth in Iran's road transport sector for this purpose, the criteria used Incremental capital output ratio and explaining for road transport sector in the period 1389-1353, Incremental capital output ratio is calculated. The neoclassical growth model, investigated the effect of investment on economic growth in Iran's road transport sector. According to the research findings, if a percent Increase the investments made ​​in the road transport sector on GDP, the value added rate will grow % 0.213 and increasing in rates of labor growth in Road Transportation will result in increased growth rate of value added in road transport to 0.389. Also, a percent increase of energy consumption in road transport and export of crude oil Road transport sector's growth rate increased of 0.157 and 0.383percent & Dummy variable for war period has a negative effect. Roadمرکز تحقیقات راه، مسکن و شهرسازی23

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2015112http://road.bhrc.ac.ir/article_48199_4370945e68f23839371f0297576a637c.pdfThe Reviews Kfbnd Eliminated in the Consolidation of the Basic Structure of the NATM Excavation Method Using Data Analysis Instrumentation
(Case Study: Subway Line A Qom)ABakhshi-sedapishehکارشناسی ارشد مهندسی عمران گرایش زلزله، دانشگاه آزاد شبستر، آذربایجان، ایرانauthortextarticle2015perIn the non-mechanized Tunnel Drilling projects of or the same new method to NATM tunneling Austrian who is known one of the steps to consolidate the implementation temporary structures, construction and installation the tunnel is Kfbnd. In this paper, with a case study conducted in the areas of Qom subway tunnel and tunnel behavior in different time zones without installing instrumentation Kfbnd data has been analyzed And have reached to the conclusion that the tunnel without installing Kfbnd retained their stability and do not only makes the very much economic save in the project will be. But also caused enhances the speed in the tunnel is Level completed. Tunnel for drilling in projects are usually advance after certain amount of work to be done to stop lining operations. According to the survey conducted in this paper proposes to install temporary to consolidate in step Kfbnd been refused and speed dig up and sooner began lining operations. . Roadمرکز تحقیقات راه، مسکن و شهرسازی23

20152334http://road.bhrc.ac.ir/article_48200_562b87d631624c6ae037a384c5553b0d.pdfPerformance Evaluation of the public transportation system (Case study the Khorramabad city of Lorestan Province)MAlipourکارشناس ارشد مهندسی عمران-راه و ترابری، دانشگاه شهید چمران اهوازauthorS.JHejaziدکترای مهندسی عمران-راه و ترابری، استادیار دانشکده مهندسی عمران، دانشگاه شهید چمران اهوازauthortextarticle2015perTaxi transit routes management is facing increasingly serious challenges in every city, and the execution of efficient Taxi management is a pressing issue for municipalities and transportation enterprises. Also, transit systems routing is a hard problem and is effective on construction and operation costs as well as on operational indicators (e.g., ridership, trip speed, trip time decrease, land use modification and environmental impacts). A data envelopment analysis (DEA) is an optimization-based technique used widely to measure relative efficiencies of public transit agencies. This paper evaluates the performance of Taxi routes within a public transit system using the CCR model of the DEA. We construct a conceptual framework of performance evaluation and select appropriate input and output indices to compute the operation efficiency and service effectiveness of each Taxi route. Function-achievement is then analyzed and bus routes, which need to be optimized and regulated, are screened out. Seven Taxi routes of Khorramabad city in Lorestan Province are selected for the practical application. Roadمرکز تحقیقات راه، مسکن و شهرسازی23

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20153548http://road.bhrc.ac.ir/article_48198_9089fd1929f216907baecd8776205dbe.pdfInvestigation of Shear Strength of Geogrid-Soil Interface in Direct Shear TestALaki-rohaniاستادیار، دانشکده فنی، گروه عمران، دانشگاه زنجانauthorMAbasianدانشجو کارشناسی ارشد، دانشکده فنی، گروه عمران، دانشگاه زنجانauthortextarticle2015perGeogrid is one of the geosynthetic products that is used as a separator between different layers of base and sub-base. In the past decade shear strength of geogrid-soil interface has received attention from different researchers. Strength of interface has several parameters and in this article some of them have been investigate by direct shear tests. The value was defined to evaluate the effect of geogrid on the shear strength of the soil which is the ratio of geogrid-soil shear strength to internal shear strength of soil. The test results show that: 1. the soil-geogrid interface has significantly lower shear strength than the soil strength. 2. geogrid has a reduction effect on the shear strength of reinforced sand and this reduction will be more with the increasing of the degree of compaction. and 3. Larger geogrid apertures create a proper space for interlocking of soil particles to penetrate through geogrid apertures and therefore increase the shear strength of the reinforced soil. Roadمرکز تحقیقات راه، مسکن و شهرسازی23

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20154956http://road.bhrc.ac.ir/article_48201_a7d0fb73cec21ed0b87324fcb9f1c456.pdfPrevious study in the past decade shows that climate has a significant effect on the performance of asphalt pavementsHTaherkhaniاستادیار، دانشکده فنی و مهندسی عمران، دانشگاه زنجان، زنجانauthorMMahdizadeh-taleeiدانشجوی کارشناسی ارشد راه و ترابری، دانشگاه زنجان، زنجانauthortextarticle2015perPrevious study in the past decade shows that climate has a significant effect on the performance of asphalt pavements. External environmental factors such as precipitation, temperature, Freezing & thaw cycles effect on all the pavement distresses. Therefore, a new experimental design - analyzing guide for pavements (AASHTO 2004) has been provided in order to investigate the effect of weather conditions on pavement performance climate data are imported in software (namely MEPDG) as the basic data. For the purpose of this study, by obtaining the climate data of the State Meteorological Organization for different weather regions of Iran And converting to the format required by MEPDG software, attempting to run the software and sensitivity analysis of distresses in different areas of climate to change the design factors. The results of evaluate all the sensitivity analysis showed that the pavement is not performance on different climatic zones and the effects of temperature, moisture and freezing & thaw cycle can be different on any of distresses, in different climatic zone. Finally, with evaluate effect of change in the design parameters, it was shown that the sensitivity of distresses to changes in the thickness of the asphalt layer and truck traffic is more than other factors. The determination of subgrade for areas with long freezing & thaw cycles, due to sensitivity of fine- aggregate soil to freezing and swelling them in the thaw of ice season, is also important. Roadمرکز تحقیقات راه، مسکن و شهرسازی23